Detailed product description: 1)Standard: DIN2391, EN10305-1, EN10305-4 2) Steel grade: St35, St37, St45, St52, E235, E355 3) Condition: GBK(+A)NBK(+N), BK(+C), BKS 4) Size: OD3-60mm. WT0.5-8mmMax length 12meters. 5) All steel tube can test Ultrasonic flaw detector, Eddy current flaw detector, depend on customers requirement 6) Usage: Cylinders of
